An uplink multiple access method based on the user-specific frozen bit patterns of polar codes assigned to users and relevant transmitter-receiver embodiments. The method includes encoding the information bits with a polar encoder by using the binary-valued, user-specific frozen bit patterns in frozen bit locations during encoding operation. The method further includes mapping of coded bits with symbols to be transmitted and baseband-to-RF processing performed on the symbol sequence. The generated signals of each user are transmitted by using the same time-frequency resources. The method further includes to receive the superposed signal of multiple users transmitted by means of relevant uplink radio channels. The method further includes an RF-to-baseband conversion on the received signal and detecting and decoding each user data by using an interference cancellation multiuser detector and a polar decoder that uses binary-valued pattern sequences assigned to the users in the frozen bit locations.
Legal claims defining the scope of protection, as filed with the USPTO.
1. An uplink multiple access method based on user-specific frozen bit patterns of polar codes, wherein a binary-valued pattern sequence to be used in frozen bit locations is determined based on preset rules and protocols known to transmitter units and a receiver unit and wherein a length of the binary-valued pattern sequence is at most N−K, where K is an integer representing a length of an uncoded information bit sequence and N is an integer representing a length of a coded bit sequence, wherein, a transmitter signal generation comprises process steps of: providing the binary-valued pattern sequence to be used in the frozen bit locations during a polar encoding operation; performing a channel encoding operation to information bits using a polar encoder, wherein binary-valued, user-specific frozen bit patterns are used in frozen bit locations during the channel encoding operation; mapping coded bits to symbols to be transmitted, wherein a generated symbol sequence is a set of complex-valued number representing a baseband signal to be transmitted; performing a baseband-to-RF processing onto the generated symbol sequence to generate a transmitted signal; wherein each bit of the binary-valued pattern sequence to be used in the frozen bit locations is generated according to a Bernoulli distribution, with parameter p, wherein p is a real number such that 0≤p≤1, wherein, p represents a probability of a value of a bit equal to 1 and 1-p is a probability of a value of a bit equal to 0; and storing the generated symbol sequence at the transmitter units and the receiver unit, in the step of providing the binary-valued pattern sequence to be used in the frozen bit locations during the polar encoding.
2. The uplink multiple access method according to claim 1 ; wherein the binary-valued pattern sequence to be used in the frozen bit locations is selected from a preset generated pattern sequence table according to an index information sent from the receiver unit, in the step of providing the binary-valued pattern sequence to be used in the frozen bit locations during the polar encoding operation.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
February 21, 2019
March 3, 2020
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